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I just need what I hope is a little help re-directing the text coming into COM5 to be sent out on COM3.

I have an android phone which sends GPS NMEA data to my laptop. This shows up on COM5 in Device Manager.

I have a serial device (computerized astronomy telescope mount) which needs the NMEA data stream at power up. This is attached through a USB to Serial dongle showing up on COM3.

Both connections are working.

The only thing I need is a way of passing the incoming GPS data to the mount through its COM port.

Compo
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user10025
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  • If you already have two programs that work with each other, you will have to either incorporate the other function into one program or create a third program that has both functions. However, it will not be possible with batch files. – kunif Nov 07 '19 at 15:34

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I wonder why you need to put a PC in the middle to forward the NMEA commands and not connect both serial devices directly.

I guess you have your reasons; whatever those are you can do that very easily with Termite:

https://stackoverflow.com/a/56377015/11476836

Marcos G.
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  • Marcos, I removed some bloat from the question body itself, so as you stated, 'they'll have their reasons', I thought I'd add that information here. "I have an App on the laptop that uses the GPS data and it's coming through just fine. I have another app that controls the mount through the USB Serial connection that also is working". I would suggest therefore that the PC is required for those two apps to function. – Compo Nov 07 '19 at 15:07
  • Exactly right , Compo. Il'll give Termite a try tonight. It's getting flagged as spyware by IT here at work. - Pat – user10025 Nov 07 '19 at 16:03
  • OK then guys, I see your point. There is a similar use case [here](https://stackoverflow.com/a/57062146/11476836) – Marcos G. Nov 07 '19 at 16:41